Electric truck.



A. P. BATGEBLDER.'

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R. n m N L E E V m H .C T A .D rr. NA 5 Non N UNITED .STATES PATENT OFFICE.

ASA E. ATCHELDER, or SCHENECTADY, NEW YORK,A AssIeNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION or NEW YORK.

. ELECTRIC TRUCK.

Specification of Letters Patent.

Application led April 7, 1906. Serial No. 310,413. g

new anc` useful Improvements in Electric Trucks, of which the following is a specification.

I Th'e present invention relates to trucks and particularly to trucks for electrically propelled cars. It has heretofore been custom ary to adapt trucksforelectric service by. slightly rearranging -them so,as to provide room for motors. The motors have been introduced as units complete 1n themselves and entirely. separatefrom the truck structure except that the trucks serve as supports.A Sucharrangements, While answering the re-v quirements for ordinary'urban service, ob-

viously impose limitatlons in design such that the most advantageous results as to simplicity, strength, durability and efficiency cannot be obtained. For heavyservice, however, such, for example, as auxiliary/local traiiic on steam roads, the motor and truck apparatus assumes such importance that the l Athe truc design should besuch as to produce the best results as to simplicitya of construction, du-

rability and eliiciency, both from mechanical` and electrical, standpoints. `Thepresent invention therefore has for lts object to provlde an lelectric truck Where- A.in vthe mechanical and' electromagnetic features'are so constructed and arranged with reference to each other as toinsure the great- :est sim licity, durability and eiliciency in as a whole.

To the above ends I mount the armatures directly upon vthe driving axles so as to Obviate the. necessity of gearing-between the motor and axles, and arrange the truck frame so that each armature is situated within a rectangular frame, two of the sides of which .constitute a transom member and an end member.. These frames are preferably made of a few dee flanged plates-tied together into one rigl structure.' The field magnets preferably take the form of U-shaped yokes,

4.the arms of each of which are rigidly secured fto a transom member and to an. end member of the truck frame. The truck frame 'and the field 'magnet structure or structures thus constitutes. single unit composed of parts rigidly connected together and mutually supporting each other so aslto form an exceedsupported upon the axlesand thereforethe ingly strong whole. This unit is yieldinglyfield magnets move relatively to the arma tures. The field magnets areeachpr'ovided with a pair of inwardly projecting pole'A pieces arranged in the plane of the'axles and havin their pole-faces so constructed. that the poe-pieces may remainclear of 'the arlmatures as the truck'frame moves up; and

down.

The present invention alsocomprises a' novel, form ofswing bolster 'adapted to be hung between the transom members; this' bolster being so constructed that-a maximum rigidity of the bolster bodylis obtained for any given 'height of springs upon whichthe bod)r is supported.

present invention -'in its-.'various'ass pects will be more fully understood and its trates a preferred embodiment Of my inven'f tion, Figure 1 is aplan view of the truck Fig; 2 is a side elevation thereof; Fig. 3 is a' longitudinal section; and Fig. 4' is a crosssection through the center of the truclcslxovff'-v ingthe bolster construction. v

Reference being had to the drawings,"1inf j dicates the truck frame which is composed 4 and V5 of four U-shaped members, 2, 3

preferably made of deep channe -iron and so arranged that parts of the members 3 andl 4 form transoms 3a and 4, While parts of the members 2 and 5 form end pieces'u2l and 5,

the transoms and the end pieces beingyarranged parallel to each other. The ends of the armsof the members 2, A3, and 4, `5, are slightly Aseparated from eachother andare provided with pedestal pieces' 6 between which the journal boxes 7 are slidin'oly i mounted. The four U-shaped members are tied together into one rigid whole 'by meansoftop pieces 8 and 9 and bottom pieces 10 and 1].. lhese top and bottom pieces extend throughout the length ofthe truck frame,

and, where the U-shaped members 'are made of channelfiron or other flanged construction, these pieces are'secured tothe top ,and

bottom anges of the arms of the members,

as by means of bolts 12. When'the several' parts are fastened together a very" alla@ rigid construction is produced and one which; I

cannot easily be distorted under,. o'rdinary conditions'.

13 and 14 are driving axles journaled inl the boxes 7, and the truck frame is carried upon the. axles and axle boxes through suit f able spring suspensions. i A convenient forni of suspension consists in yokes 15 resting upon the axle boxes, together with semi-elliptical springs 16 supported upon the yokes and carryingwat thea ends hangers 17 and 1S which are pivotally eonnectedto the truck frame at 19 and Q0,

respectively.

Motor armatlflres Q1 and 22 are mounted on the axles 13 and 14, respectively. The field magnetsare preferably bi-polar and consist of broad U-shaped yokes Q3 and Q-l' having their arms riveted or otherw;se secured to the broad web of the end aml transom members. Pole-pieces 25 and Q6 project inwardly from the arms of the yoke into close proximity 'to the armature, and pole pieces 27 and 28 are similarly associated with the yoke 24. The pole. nieces are all arranged in a horizontal plane so that the entire field structure may ride up and' down with the truck frame. It will be seen that the truck frame is materially stiiened by reason of the field magnets, so that the arrangement of parts which provides a simple and compact field structure serves also to make the truck frame stronger mechanically.

The swing bolster consists of a body portion 29 preferably built up in the form ofan elongated box of channel members 30 and 31 and top and bottom members 32jaud this box-like member being supported upon 'sets of springs 34 and 35 which rest upon the end of a frame J6. The frame 36 is hung between the transom -members by means of links 37 and 38 and 39 and 40, the upper ends of which are journaled upon shafts 41 and 42 carried by brackets 43, 44, and 45, 46, rigidly secured to the transom. The lower corners of the box are cut away, as shown at 47 and 48, so s to clear the supports for the springs. Thus the inner ends of the springs may extend wellinto the body of the bolster and the lower portion of the body may d rop below the supports for the springs. By this arrangement the body of the bolster may be made deep and 4strong without necessitating a decrease in the size of the supporting springs and without undulyr elevating the top of the bolsten Although I have illustrated only a preferred form of my invention I do not desire to be limited to the details illustrated except as particularly pointed out in the appended claims, since in its broader aspects the invention may take va ious forms.

What I claim as lnew and desire to secure by Letters Patent of the United States, is,-

1. In an electric truck, a truck-frame comprising transom members and end members rigidly connected together, an axle journaled between. each end' member and tne correl sponding transom member, 'a motor armature f mounted upon -one of said axles, and a field magnet supported upon the end member and E the transom member between which said'armature isl located. 70

2. ,In an electric truck, a truck-frame comy prising end members and intermediate transom members rigidly connected together, an axle arranged between each end meniber and the corresponding transom member, a yield- 7 ingl connection between said truck and said axles, motor armatures mounted on said axles, and a field magnet supported upon each end member and the corresponding transom member.l gg

3. In an electric truck, a truck-frame comprising four U-shaped members arranged to form two rectangles and4 top' and bottom pieces rigidly connecting .said members together, two of said members forming the g5 transom and the other two members constituting end pieces, an axle journalcd be# tween the ends of each pair of members, mo tor armatures on said axles, and a field magnet supported upon each pair of members. 90

4. In an electric truck, a truck-frame comprising two pairs of U-shaped members arranged to form two rectangles and top and vbottom pieces rigidly uniting said members, Vtwo of said members forming a transom and the other two members constituting end ,I pieces, journal boxes yieldingly mounted between the adjacent ,ends of each pair of members, axles'jonrnaled in said boxes, n iotor armatures on said axles, and a. field magnet supported upon each pair of members.

5. In an electric truck, a truck-frame comprising transom and end members ri 'dly connected together, an axle joui-nale between each end member and the correspondf ing transom member, motor armatures mounted upon said-axles, and a U-shaped field magnet supported upon each transom member and the corresponding end member.

6. In an electric truck, a truck-frame comprising transom .members and end members rigidly connected together, an axle journaled between each end member and the corresponding transom member, motor armatures mounted upon said axles, and field magnets each comprising a l'J-shaped yoke havmg pole-pieces projecting mwa rd ly from the arms thereof, each of said field magnets being rigidly connected to one of the transom members and tothe corresponding end member.

7. 'In anelectric truck, a truck-frame co'mprisinv two pairs of U-shaped'members arranged to form two rectangles, to and bottom ieees rigidly connecting sai members togen er, two of said members forming a transom and the other two members'formmg end pieces, an axle journaled between each pair oi-Jnembers",` motor armatureson said axles, a field magnet rigidly supported upoh 13C Som member and 'an end member, motor ar- `between said transom members.

comprising channel-iron transom members and end members rigidly secured together,

each transom member and the corresponding end member,- and a swlng bolster suspended 8. In an electric truck, a palr of axles, ree, tan'gular` frames supported'upon said axles a rigid connection between said fframes, each of said frames forming a transom mem'bel'- and an end member, motor armatures mound led upon said axle, and a field magnet sup ported upon a transom member and the end member of each frame. l

9. In an electric truck, a pair of axles, rectangular` frames resiliently supported upon said axles, a rigid connection bet-Ween said frames, each of said f 'ames forn'xing a ranmatures mounted upon said axles, and a" Iield magnet rigidly supported upon the transom member and the end member of each frame.

10,'In'an electric truck, a truck-frame an axle joqrnaled between each end member yoke's being rigidly secured respectively to the web of a transom member and to the web ofan end member.

11. In a truck, a main frame having tranoms extending transversely thereof, a frame ASA F. BATCHELDER. A

"itnesses BENJAMIN B. HULL, -I-Inmcx ORFORD. 

